condition mean min max ZT0-3 0.33198178333333334 0.04365485 0.4960255 ZT4-7 0.6990745 0.6990745 0.6990745 ZT8-11 0.7630145 0.7630145 0.7630145 ZT12-15 1.227201 1.016662 1.43774 ZT16-19 0.800538 0.800538 0.800538 ZT20-23 0.9138065 0.9138065 0.9138065